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The power system modelled in this thesis work has been developed for simulationwhen e.g. the production in some part of the power system is changed. The powersystem has been modelled according to the swing mass of the system, the frequencydependency of the load and the turbine …
Bidraget till minskade förluster
… from the early electrification of the Swedish railroads has resulted in a power grid with a lower grid frequency than the national power grid from which it is fed. Energy transfer between these power grids with different frequencies requires substations, adapting the grid …
Most of the portable electronic devices use a battery as a primary power source. Nowadays, when the applications are becoming smaller and smaller and more power efficient, the designer needs to concentrate more on reducing power consumption, using secondary power sources and …
… was to investigate the effects whole body vibrations on maximal strength, power output and neuromuscular activity in m. pectoralis major during bench press. Participants consisted of 35 male and 9 female military high school students (m=23, 1 years). On the basis of initial …
… currenttransformers. The measurements in this study involve current, voltage, power, power factor,temperature, energy and power quality.Measuring instruments that are relevant to implement are intended to measure current,voltage, power, power factor, energy and, possibly, power …
… is (together with the other transmission system operators of the Nordic power system) responsible for keeping balance between the generated and demanded power in the Nordic power system. Spontaneous load variations and system disturbances, however, lead to power imbalance …
… board of directors. Furthermore, management in entrepreneurial firms have more power than non-entrepreneurial firms, and they regularly report to and seek advice from the board of directors. These entrepreneurial firms have shown virtually no long-term planning and performance …
The aim of this study was to examine the aspect of power in the relationship between the personal assistant and the disabled person he or she works with (the user). The study was based on interviews with five personal assistants who worked for private companies that provided …
… AB in the department of mechanical engineering, FTCM. Forsmark nuclear power plant has had problems with cracks in some of the control rods which are placed in the reactor at Forsmark 3. To investigate the cause of this, material samples were taken from five of the damaged …
Exemplet stormen Dagmar och 4G-kommunikation inom smarta elnät
To be able to secure a safe and reliable power supply is becoming increasingly important since society depends on services and functions that need continuous power supply. The delivery rate in Swedish power supply is 99.98 % which insists on a high availability. During the past …
Nätstudie av olika utföranden i normal- och reservdrift
Since 2004, wind power has had the largest installation of new capacity compared to other energy sources in Sweden. Accommodating new wind power may require strengthening or rebuilding of the existing grid in areas where the grid is already loaded to maximum capacity. This …
en korrelationsstudie med deltagare från Sverige och Tyskland
… relaterade till i vilken utsträckning en individ har Internality, Powerful others eller Chance Health Locus of Control. En NEO-PI enkät och ett Multi dimensionella Health Locus of Control-skalan-formulär administrerades. Resultatet från undersökningen kunde påvisa en signifikant …
En detaljstudie angående harmoniseringen av avtalsrätten inom EU
… the number of unfair contract terms also enhanced. Therefore, the legislative powers in Sweden and England realised that the rules concerning the freedom of contract had to be restricted and governed. As a result, the legislative powers introduced an open control device through …
En validerande informationsinsamlingsmetod för ökad kunskapsåterföring
This master thesis has been carried out at Scania R&D at the department for Powertrain Control System Development during the winter of 2010/2011. In the thesis the writer examine and evaluate the existing method for collecting information from the tests carried out during the …
Transmission of reactive power is well known to cause active power losses. Thus, newcomponents who can help minimizing these expensive reactive power flows are ofgreat interest to the power distribution companies. ABB Corporate Research hasdeveloped the first electronic power …
